i am not an expert, but,
do you have jumbo frame enabled on your nic and switch?
try using ethtools...
RP
Mark Smith wrote:
Mark Smith wrote:
As a data point, I'm going to try a newer version of Samba. (RHEL4
uses 3.0.10-RedHat-Heavily-Modified-Of-Course) If that makes a
difference, then I have to decide whether it's worth it to me to keep
RedHat support or not. (And when I say "I," I really mean "my
management.")
I've just tried this. Samba v3.0.23c, built locally from the Fedora
Source RPM as distributed at samba.org, makes no noticeable difference:
still about 45 seconds.
I have lots of memory. I use these configurations in sysctl.conf to
up the performance of send/recieve windows on my systems. There's
articles out there. I don't have historical references handy.
YMMV.
net.core.wmem_max = 1048576
net.core.rmem_max = 1048576
net.ipv4.tcp_wmem = 4096 65536 1048575
net.ipv4.tcp_rmem = 4096 524288 1048575
net.ipv4.tcp_window_scaling = 1
I have not tried tweaking the TCP stack in the OS. I'll give that a
shot.
The person at RedHat who's handling my ticket just suggested these very
changes, without the last one. They did not help. The values he gave
were a little different:
----- snip! -----
# increase TCP maximum buffer size
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
# increase Linux autotuning TCP buffer limits
# min, default, and maximum number of bytes to use
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
----- snip! -----
I also tried your values, with the tcp_window_scaling, with no luck.
-Mark
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